Prego?

So I'm 15 and please no hate , but i have had sex before and 3 weeks ago me and my bf had sex without protection at first then we used a condom after a bit an for some reason i started bleeding so he stopped then a week or so later we had sex again an i started bleeding again an my period was supposed to 2 days ago as my calendar says an it hast! am i prego? i have had my period regularly every month an ihaven't got it yet! ?